MRT 122 PRE II Quiz Bowl

The magnification factor is 1.5 on an x-ray, & a mass on the x-ray measures 12cm, what is the actual mass size?

In order to maintain 45” SID, when the tube is angled 35°, the new vertical distance should be 36 inches.

Using the air‑gap technique, if the anatomy is 10 cm from the image receptor, the SID should be approximately:

Patient exposure is reduced with the use of speed numbers above 400 as compared to those speed numbers below 400.

With digital imaging, quantum mottle will be demonstrated on underexposed CR images

With digital imaging, as the number of pixels increase, the image resolution decreases.

As the kVp level is decreased, does the amount of photoelectric interaction increase OR decrease?

What would happen to the anode if the temperature was rapidly increased without the use of the warm-up technique?

On the Radiographic Rating chart, if the intersection of kVp & exp. time is below the mA curve, the exposure is unsafe.

The total brightness gain (approx. 8-25k) refers to increased light emission from:

The percentage of x‑ray photons scattered is greater at 50 kVp than at 100 kVp.

In digital radiography, the bit system is used to describe the:

What is the purpose of the ADC in digital radiography?

Of the following sets of exposure factors, which one will produce the highest image contrast?

If the kVp is decreased, does the contrast on the image: increase OR decrease?

Off-focus (stem) radiation originates at the:

Which type of phosphor is used in CR photostimulable plates?

When selecting the small filament, the effective focal spot size would be:

The size of the image matrix controls the:

A 14” x 17” of the abdomen requires 20 mAs @ 80 kVp. If the field is coned to an 8” x 10” what mAs should be used?

During tomography, as the exposure arc increases, does the detail on the image: increase OR decrease?

Size distortion on an x‑ray image results from:

The “photostimulated luminescent” process that occurs in the digital reader/processor results from:

According to Federal Regulations, the length of the exposure cord on a portable x-ray unit must be 5 feet.

The “anatomical image pattern” emitted by the photocathode is formed by:

With tomographic imaging, an arc of greater than 10 degrees is referred to as zonography.

Disproportional magnification will occur when doing a PA axial projection of the skull.

In digital imaging, if the pixel has a high numerical value, that would be consistent with a thinner anatomical part.

A fiberglass cast requires what technical adjustment as compared to a non-casted extremity?

Frequency describes: The distance from a point on one wave to the same point on the next wave.

With digital imaging, underexposed CR images will demonstrate low contrast.

The fuzzy, out-of-focus border of the anatomical part is referred to as umbra.

Tomography equipment is used for producing in‑focus plane images

When using the Agfa CR System, properly exposed imaging plates should produce an overall “Lgm” value of:

The half value layer is used to measure x-ray beam:

Exposure latitude is controlled by the kilovoltage selection.

Geometric unsharpness can be controlled by increasing the OID.

Phantom images seen on tomographic images are: false images, or other blurred structures

The percentage of x‑ray photons scattered is greater at 50 kVp than at 100 kVp.

An adult KUB technique is 40 mAs, 80 kVp. For a 4‑year old child, you could therefore use 30 mAs, 75 kVp.

The image intensifier's input phosphor is generally composed of:

Sharpness in detail on an image is dependent on mAs.

Inherent filtration consists of:

Acceptable techniques for 3‑phase equip. must be ____ if doing that same procedure using single‑phase equip.

To maintain the image density, if the kVp is decreased by 15%, how much should the mAs be increased?

Starting & stopping the rotor switch unnecessarily will eventually result in what type of tube failure?

The intensity of the x-ray beam describes the x-ray beam’s penetration ability.

A fluoro exam is done using 120 kVp, 3 mA, and takes 3 minutes. The amount of anode heat units accumulated would be:

What is the formula used to determine the total heat units for high frequency x-ray equipment?

To prevent excessive exposure to the patient, the fluoro lead shutters should never exceed the size of the: